| <!doctype HTML> |
| <script src="../resources/testharness.js"></script> |
| <script src="../resources/testharnessreport.js"></script> |
| <select id="target" size="2"> |
| <option> value 1</option> |
| <option> value 2</option> |
| <option> value 3</option> |
| <option> value 4</option> |
| </select> |
| <script> |
| if (window.internals) { |
| internals.settings.setPreferCompositingToLCDTextEnabled(true); |
| } |
| function assertLayers(expected_count) { |
| var json = internals.layerTreeAsText(document); |
| assert_equals(JSON.parse(json).layers.length, expected_count, json); |
| } |
| test(() => { |
| assertLayers(2); |
| }, "scrollable"); |
| test(() => { |
| target.size = 4; |
| assertLayers(1); |
| }, "not scrollable"); |
| </script> |
